Attachment for sewing machines



Nov. 3 192s. v'1,560,282

' A. B. MATTINGLY ATTACHMENT Fn sEwms mcmnss origina Filed ucv. s. 1915-4 Sheets-sheet 1 f WH 'sg 39 104 105 A85 8f Nov. 3 1925- 1,560,282 A. B.MATTINGLY ATTACHMENT FOR `SEWING MACHINES Origi/.nal Flad No1. J131.3 4sheets sht 2 fa l 18 Wamesss.' 2"

Nov. 3 1925 f 1,560,282 A. B. MATTINGLY ATTACHMENT FOR SEWING MACHINESOriginal Filed Nov. 3, 1915 4 sheets-sheet 3 y 55 5l l 33 Winesses:

Nov. 3 g 1925'.

" A. sz-MATTINGLY ATTACHMENT FOR SEWING MACHINES origingusned nov. s.191s 4 Sheets-Sheet 4 Wn asses:

afi/Zak@ Patented Nov. 3, 1925.

YUNITED STATES ALBERTUS B. MATTINGLY, F NEW YORK, N. Y.

ATTACHMENT non SEWING MACHINES.

Substitute for application Serial No. 798,972, filed November A3, 1913.Renewed December 20, l1919, Serial No. 346,433. This application filed4September 10,1923. Serial No..662,004.

To all whom t may concern:

Be it known that I, ALBnRTUs B. MAT- TINGLY, citizen of the UnitedStates, and resident of New York, in theco-unty of New York and State ofNew York, have invented certain new and useful Improvements inAttachments for Sewing Machines, of which the following is a.specification.

This invention :relates to an improvement in attachments for sewingmachines, and the inventor is aware'that the device is of a naturesimilar to that disclosed in British Patent No. 17,153 of 1905, toHills, and the United States Patent No. 990,610, to Turck, and theobject is to overcome some of the objectionable features of thesedevices and to further improve the same.

lThis application is substituted for my prior application, Serial Number798,972, filed November 3, '1913, and which was renewed December 20,1919, Serial Number 346,433.

The principal objects are to provide a device of this characterto'automatically cut or slit the cloth just in advance of the stitching orbinding of the button-hole so that the needle may pass alternatelythrough the cloth and then through the slit or cut, thus causing thethread to be brought through the cut and make a perfect binding of theraw edges of the hole, and to provide a means for positively actuatingthe knife so as to give it a quick and decisive action at the properperiods to make the cut the proper length according to the length of thebutton-holes, and to have the length of cut automatically adjustitself'with the adjust- -ing of the device for the length of thebutton-hole.

The further objects are to pro-vide a device of this character which byits construction is consi erably reduced in heightvand thereby doingaway with the necessity of removing the face plate of the sewing machineto adjust the presser bar, and by the construction of the base plateobviating the necessity of removing the feed dogs of the sewing machine,(both of which things have to be done before the Hills or Turck devicesvcan be attachedto the machine).

The still furtherobjects are to provide an improved ratchet device foreffecting the lateral vibration of the work clamp, to produce 'theoverstitch of the edge of the button-hole, and to form other parts ofthedevice by the stamping process, and by screwmachines which `are thecheapest methods of manufacturing devices of this class.

. A `still further object is to provide a device vof thiskind in whichthe knife can be adjusted to cu-t a line or slit in which the needlewill follow with its inside lines of its vibrating motion on its forwardmovement Vand also perform the same function on its backward `movement1n forming `or stitching the button-hole.

With these and'other objects in view, it will beseen that I accomplishthe foregoing, by referring to the accompanying drawings forming a partof this specification; ybut I do not wish to confine myself to the exactconstruction shown, as I have, for the sake of clear illustration,exaggerated some of the parts, especially in the side elevations.

In the accompanying drawings, showing one embodiment of my invention,Fig. 1 is a plan View of the device; 2 is a side elevation; Fig. 3 is ahorizontal section taken on the line 3-3 of Fig. 2 fand showingdiagrammatically the operating cam friction drive or eccentric in dottedlines; Fig. 4 is a similar view to Fig. 3, showing more clearly theoperating means for the knife; Fig..5 is a similiar viewrto Fig. 4 withthe knife and its operating means removed;

Fig. 6 is a similar view to Fig. 5 with the work clampand kknife guideand also the retaining washer removed, and showing thevibrating-mechanism; Fig. 7 is a similar viewto Fig. 6, showinga part ofthe vibrating mechanism removed and showing the pawl plate and theadjusting means for the knife, and the adjusting Vmeans for controllingthe length of throw of the vblator; Fig. 8 is a central vertical sectionof the device; Fig. 9 is a perspective view of the operating lever;Figs. 10, 11 and 12 are three views of the vibrator; Fig. 13 is aplan-of the vibrator carrier; Figs. 14 and 15 lare two views of theknife carrier; Figs. 16 and 17 are two views of the ratchet cam; Figs.18 and 19 ,are two views of ,the shield for the knife carrier, andintegral therewith the stripper plate for the needle, andthe guide forthe workclamp; Figs. 20 and 21 are two views of the vpawl plate foroperating the ratchet cam; Fig. 22 isa plan ofthe work clamp; Fig. 23 isa top plan ofxthe eccentric yoperating mechanism, showing4 theadjustable eccentric cam; Fig, 24 is va fbot- I provide a suitable baseplate 1, which is secured to area-r throat plate 2 of the sewing machinein any suitable manner, but

preferably screwed thereto, as shown in Fig. 1 of the drawings.

The kbase plate 1 is' provided with an ear 3, which is upwardly turnedand carries the operating lever 4, which rocks on a pivot '5`formed of alarge screw, the lever 4 being provided with a bifurcated end 6 whichengages. the shank of the screw of thetightening collar Vof the needle`bar of the sewing machine. The'lever 4 is further provided with anarc-shaped slot `7, through fwhich passes the arm vof the frictionclutch,

which receives its movement from the screw 8 in the ear 9 and the rearend 10 of the slot 7. The screw 3 is frictionally held from turningbythe pressure' of the spring 11 againstits head rand the ear 9.` Thelever '4,is furtherqprovided with an arm or eX `tension which has an,upturned bifurcated end 12, which operates the pawl plate 13 by the webportion 14. 1 j

The base plate 1 is further provided with a stud'or pivot 15, which Ihave shown -screwed into the base plate Vwith its flange or enlargement16 resting against the plate. Rotatably mounted upon the stud L15 andsupported bythe flange 16 is the pawl plate 13, (which is swunglin anarc by the end 12 of the lever 4 in a forward and backward movement).ARotatablymounted upon the stud 15 and resting upon the pawl plate 13 isa ratchet cam 17, and above this,

`resting on a shoulder 18 of the stud 15, lis the retaining` washer 19,and. then the eccentric disk 2O carrying the adjustable eccentriccam 22,which is held in position by a Tbolt 23 and lock nut 24. The top of thestud 15 is provided with a friction washer 25, which is prevented fromturning by the flat 26 of the washer and the flat 27 of the stud. Thefriction iscaused 4by the tightening of the screw 28 `of the stud, whichcauses the washer to press the disk'20 against the retaining washer 19.

'The base plate 1 is further provided with a cut away portion 29havin'g'an ear 30 bent horizontally, and slightly above the bottom-level of the base plate, passing through the slot 31 is a screw 32 intoan L-shaped member 33 having a slot 34 and an upturned ear 35. The slot34 is for receiving the bottom end of the pin 36 ofthe L-shaped memears52. y

ber37, which is provided with a slot 38 for adjusting it upon the baseplate 1 by the screw 39, and it is also provided with an upturned ear 40for adjusting it while the screw 39 is loose. The pin 36 is tight in themember 37 and its upper end forms a pivot for the vibrator 41, which isconnected thereto by the hole 42 inV the'ear 43, vand -when assembledthesear 43 is capable of passing under the pawl plate 13, while the yoke44 straddles the ratchet cam and rests upon the pawl plate 13.

The vibrator 41 is provided with an upturned bifurcated ear 45, whichhas two notches 46 in whichv slides the rear yoke 47 (of the work clampv48), which straddles the stud 15 and rests on the retaining washer 19,which working in conjunction with the slots or notches 46 keeps theforward part 49 ofthe Workv clamp in proper contact with the base plate1 and prevents the bot-- `tom stripper plate 50 from leaving the slottedway 51 in the base as it is oscillated by the work clamp in connectionwith the Mounted upon the yoke 47 is the guide or shield 53 for theknife carrier 54, having its front end 55 in the form of a strippingplatewhich slides in a groove or space 56 formed byl a plate 57, whichis forced into the upper jaw 58 of the work clamp. The rearend of theshield 53 is enlarged, forming-a guide 59 by means of the downwardlyextending flanges 60 fitting the yoke 47, which moves back and forthrelatively to the stud 15. The rectangular opening l61 is'k of a widthequal to the diameter of the upperend of the retaining washer whichpasses through it and prevents the shield from moving'back and forth butallows its rear end to bedrawn laterally of the stud 15 in -bothdirections by the pin 62 working in the cam groove 63 formed by the cams64 and 65, (thus causing the vibrator to vibrate or oscillate the workclamp in the shape of a button-hole 'while the. eccentric is moving thework clamp back and forth the length of the button-hole). s j

Mounted upon the guide 59 is the knife carrier 54, which has its springportion 66 passing through the openings 67 and 68 of the shield 53. Thespring portion 66 has its outer end bent upward, with two ears 69forming apair of jaws for the knife 70, which is held by a pin or screw71. -The rear endjof the spring portion 66 is formed in a rectangularframe or yoke 72 having a flange 73 forming a cam face against which thecamy 74 works, and the iexible portion 75 insures the keeping of the cam74 and the cam face 73 always in contact.

The'work clamp is provided with an eccentric yoke or member 76 having anelongated opening 77 in which works the adjustable eccentric cam22against the faces 7S and 79. (The revolving of the cam 22 around thestud 15 causes the Work clamp torbe moved yback and forth relative tothe needle.) The member 7 6 is secured tothe work clamp 48 by means ofscrewsv 80, and the forward end is `-bifurcated and `bent so Vas to formbearings for the locking member 81, which is formed yof ya bent wirehaving a central portion 82 which `acts in the capacity of a hand leverto operate the two end portions 83, which act upon the spring extensions84 (of the upper jaw 58) and which yare riveted to vthe rear yoke47 ofthe work clamp.

Mounted upon the base plate 1 (see Fig. 7) is a spring member 85, whichis held in position by the screws 8G and has an upwardly extendingportion 87, which extends through the opening 88 of the pag.511 plate 18and into the holes `89 of the ratchet cam 17. This prevents the ratchetcam from 'being turned backwards by friction 'of the pawl 90 slippingoutof any one of theholes 89 upon its backward movement after it hasrevolved the ratchet cam one tenth of a turn.

The eccentric disk is revolved by a friction device 91 consisting of aring 92 carrying a friction dog 93 which turns on a pivot 95 and is`held in its biting position by a spring 94. The operation yof thefriction device will be described later on.

The base plate is further bent or formed so as to have a raised portion97 through the center thereof, upon which the bottom of the work clampslides and on which is cut the channel or groove 51 for the stripperplate 50, which hasan opening 98 somewhat inthe shape of a T. Beneaththe stripper plate 50 in the base plate is an opening 99 to allowtheneedle to perform its functions. The raised portion 97 forms a channelor groove 100, (see Fig. 8), which allows the free action of the feeddogs of the sewing machine and raises the device enough to permit thecutting of the cloth without the knife hitting the dogs on its downwardstroke.

. The operation of the device is very simple. The rear throat plate ofthe sewing .machine is removed and the device `is slipped in its placeby the insertion of the throat plate 2 which is screwed to the device,and the shank of the screw, which extreme back position is reached. Thelever 81 of the locking member 82 is then pressed forward, (that is inthe direction of the needle), and forces the arms 83 backwardsandtlnisrelieves the pressure ofthe springs 84, which` allows the ljaws`of thework clamp. to open.` The cloth .is inserted between the Vand thekstud 15.

Ljaws and the lever 81 pushed back to `its original position, thuscausing the upper `jaw Ito force vthe cloth down vinto ithe'concaveopening in the vlower jaw, and `at the same timethe flanges 96o'f theupper jaw prevent the slipping of the cloth on the lower jaw and thuscauses the cloth `to be stretched like a drum head.V With the work clampin this position the knife lis in the dotted position shown in Fig. 2,and `upon :running .the i machine the needle y'bar -strikes the top ofythe knife and forces it Vthroughthe cloth each time the needledescends, until the work clamp is almost at its extreme forwardposition, when the :cam 74 draws the 1 `turnswings the pawlwplatelzsufficiently Ito have the pawl i90 enter yone of the holes 89 of theratchet ,cam :and `revolve it one tenth `of a revolution, which causes`one ofthe pointed cam faces 101 to act on one side vof the yoke 44fandcausethe vibrator to `swing Y to one side :Ion its pivot 36. vThe facel102 prevents any-overthrow of'v the vibrator. The 'next stroke of thelneedle :causes fone of the faces I101 to act on the opposite sideof theyoke `44 and swing it 1in the opposite direction. This movement Aof thevibrator causes the work clamp toibe oscillated on its pivot `62, suchmotion being' transmitted through the ear v45 of the vibrator. While thevibrator is oscillating the work clampin one direction or the other withevery stroke ofthe needle to make the needle pass first through thecloth and then through the cut, the eccentric cam is slowly `shoving thework clamp forward the length ofthe button-hole, the speed ofthe forwardmovement :being regulated by the screw f8, which strikes the arm 98 ofthe frictionclutch and forces the ring 92 back av lpredetermined amount,(upon the downward stroke of the needle). The rear end 101ofthe slot 7,upon reaching the arm 93, (on the upward movement of the needle), forcesthe ring tomove forward and the nose 108 to `bite into the eccentric`disk 20 and cause the diskto revolve, which causes the point 109 of the`cam 221to act upon 'the face 7 9`of the member 76 and shove the work'clamp forward, andwhen the face 109,=onthe lastfhalfof'the `revolutionof the eccentric disk '20, yworks lagainst the face 78 fit causes `thework clamp to be drawn backwards. The revolving of the eccentric disk 20causes the pivot 62 vto shift its `position relatively lto the `ear 45On the 1li-rst 1part of the I flo - at the start.

revolution of the disk 20 the pivotpin 62 is in that position of thecamgroove fdesignated by the number 103, which causes the first straightpart of the` button-hole to be made. The parts 104iF and 105 cause thepin 62 to first move further away from the stud and then closer to the.stud than it was (This causes the eyelet of the button-hole to be made),and the part 106, (causes the pin to stand still until the last straightpart of the button-hole is finished), and the movement of the pin causedby the part 107 causes the two straight sides of the button-hole lto bestitched together.

In order to make a large button-hole, the eccentric cam 22 is locatedout at, the periphery of the disk20, and the nearer the center of thedisk the cam 22 islocated the smaller will be the button-hole; but nomatter what the length of the button-hole is the knife will alwaysmoveffrom under the needle bar at the same period of the operation of making.the `button-hole and be pushedy under the needle bar at the startingpoint, so that the slot will always be the -proper length. When a largebuttonhole is made its over-stitchshould be of greater length than for asmall one, so that kby loosening the screw 39 and drawing the member 37back it causes the ear lvof the vibrator to be vmoved nearer to the pin62 upon'which the work clamp oscillates, and causes a longer throw ofthe work clamp,

a or by moving the member 37 forward the throw of the work clamp isldecreased.

v To line the device up with theneedle of r`the sewing machine the screw32 is loosened and the member 33 can be moved in either direction, thuscarrying the pivot centerof the vibrator to a position which will causethe knife to line up with theneedle on the strokes which pass the needlethrough the cut.

I claim as my invention: i

. 1. The combination Iwith a frame anda work clamp mounted toreciprocate thereon and to vibrate laterally, of a stud, 'a ratchet cammounted on the stud. and having a lcentral perforation and tenperforations yin a circular series around ,the center, the periphery ofthe cam having five faces meeting to form five points, advancing means yarranged to engage the cam at said perforations to turn the cam step bystep,fmeans connected to the work clampland engaging said cam peripheryto vibrate the work, clamp, means for preventing any backward vthrow ofthe perforated cam, means for shifting Vat certain periods the VVworkclamp relatively toits pivot so as to form abuttonyhole with an .eyeletend, and means for ad- ,justing the vibratorrrelative to the stud andneedle.

2. The combination with a frame and a -W,ork clampmounted to reciprocatethereon -to engage the cam at said perforations to turn the cam step bystep, means connected to the work clamp and engagingsaid cam peripheryto vibrate the work clamp, means for preventing any backward throw ofthe perforated cam, means for shifting at certain periods the work clamprelatively to its pivot so as to form a button-hole with an eyelet end,means for adjusting the vibrator relative to the stud and needle, andmeans for regulating the length. of the button-hole;

3. T e combination with a frame and a work c amp mounted to reciprocatethereon and to vibrate laterally, of a stud, a ratchet cam mounted onthe stud and having a central perforation and ten perforations in acircular series around the center, the periphery of the cam having fivefaces meeting to form ve points, and a pawl plate on said stud arrangedto enga-ge the cam at said perforations to turn the cam step by step,and means connected to the work clamp and engaging said cam periphery tovibrate 1 the work clamp. o

4l. The combination with a frame and a work clamp mounted to reciprocatethereon and to vibrate laterally, of a stud, al ratchet K cam mounted onthe studand having a centralperforation yand ten perforations in acircular series around the center, the periphery of the cam having fivefaces meeting to form five points, and a pawl plate on said studarranged to engage the cam at said perforations to turn the cam step bystep, mea-ns connected to the work clamp and engaging said camperipheryfto vibrate the work clamp, and means for preventing anybackward throwof the perforated cam.

`5. The combination with a frame and a work clamp mounted to reciprocatethereon and to vibrate laterally, of a stud, a ratchet cam mounted onthe stud and having a central perforation and ten perforations in acircular series around the center, the periphery of the cam having fivefaces meeting to form live points, and a pawl plate on said studarranged to engage the cam at said perforations to turn the cam step bystep, means connected to the work clamp and engaging said cam peripheryto vibrate the work clamp, means for preventing any backward 6. Thecombination with a frame and a work clamp mountedto reciprocate thereonand to vibrate laterally, of a stud, a ratchetl cam mounted on the studand having a central perforation and ten perforations in a circularseries around the center, the periphery of the cam having five facesmeeting to form five points, and a pawl plate on said stud arranged toengage the cam at Said perforations to turn the cam step` by step, meansconnected to the work clamp and engaging said cam periphery to vibratethe work clamp, and means for shifting at certain periods the work clamprelatively to its pivot so as to form a button-hole with an eyelet end.

7. The combination with a frame and a work clamp mounted to reciprocatethereon and to vibrate laterally, of a stud, a ratchet cam mounted onthe stud and having a central perforation and ten perforations in acircular series around the center, the periphery of the cam having livefaces meeting to form tive points, and a pawl plate on said studarranged to engage the cam at said perforations to turn the cam step bystep, means connected vto the work clamp and engaging said cam peripheryto vibrate the work clamp, means for preventing any backward throw ofthe perforated cam, means for shifting at certain periods the work clamprelatively to its pivot so as to form a button-hole with an eyelet end,and means for increasing or decreasing the overstitch or the lateralthrow of the work clamp.

8. The combina-tion with a frame and a work clamp mounted to reciprocatethereon and to vibrate laterally, of a st-ud, a ratchet cam mounted onthe stud and having a central perforation and ten perforations in acircular series around the center, the periphery of the cam having fivefaces meeting to form five points, and a pawl plate on said studarranged to engage the cam at said perforations to turn the cam step bystep, means connected to the work clamp and engaging said cam peripheryto vibrate the work clamp, means for preventing any backward throw ofthe perforated cam, means for shifting at certain periods the work clamprelatively to its pivot so as to form a button-hole with an eyelet end,and means for adjusting the vibrator relative to the stud and needle.

9. The combination with a frame and a work clamp mounted to reciprocatethereon and to vibrate laterally, of a stud, a ratchet cam mounted onthe stud and having a central perforation and ten perforations in acircular series around the center, the periphery of the cam having fivefaces meeting to form five points, and a pawl plate on said studarranged to engage the cam at said perforations to turn the cam step bystep, means connected to the work clamp and engaging said cam peripheryto vibrate the work clamp, means for preventing any backward throw ofthe perforated cam, means for shifting at certain periods the work clamprelatively to its pivot so as to form a button-hole with an eyelet end,means for adjusting the vibrator relative to the stud and needle, andmeans for regulating the length of the button-hole.

10. In apparatus of the character stated, the combination of a baseplate, a flanged stud fitted to said plate, a pawl-plate rotatable onsaid stud and supported by the stud flange and a ratchet cam rotatableon said stud and supported by the pawl plate, the annulus of said cambeing made up of a series of arch faces meeting at points and the bodyof which is provided with an annular series of holes double in number.

Signed at New York, in the county of New York and State of New York,this 7th day of September A. D. 1928.

ALBERTUS B. MATTINGLY.

